Test bank for principles of economics 2nd by mankiw chapter 14a

Chapter 14/Firms in Competitive Markets ❖ 151

Chapter 14Firms in Competitive MarketsTest A1

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In a competitive market, the actions of any single buyer or seller willa. have a negligible impact on the market price.b. adversely affect the profitability of more than one firm in the market.c. cause a noticeable change in market production and price.d. have little effect on market production, but ultimately change price.ANSWER: a. have a negligible impact on the market price.TYPE: M KEY1: D SECTION: 1 OBJECTIVE: 1 RANDOM: YA Competitive FirmQuantity012

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Total Revenue$ 0 61218243036424854

Total Cost$ 10 14 19 25 32 40 49 59 70 82

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According to the competitive firm table shown, at a production level of 4 units which of the following is true?a. Fixed cost is zero.b. Marginal cost is $6.

If marginal cost is less than marginal revenuea. the firm must be experiencing losses.b. the firm must be earning a profit.c. the firm must be maximizing profits.d. a profit­maximizing firm should increase the level of production.ANSWER: d. a profit­maximizing firm should increase the level of production.TYPE: M KEY1: C SECTION: 2 OBJECTIVE: 2 RANDOM: Y5

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Which of the following is a characteristic of a perfectly competitive market?a. Firms are price setters.b. There are few sellers in the market.c. Firms can exit and enter the market freely.d. All of the above are correct.ANSWER: c. Firms can exit and enter the market freely.TYPE: M KEY1: C SECTION: 1 OBJECTIVE: 1 RANDOM: YThe graph depicts the cost structure for a firm in a competitive market

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According to the graph, when price falls from P4 to P1, the firma. has greater fixed cost at production level Q1 than at Q3.b. is unwilling to produce any output.c. should produce Q1 units of output.d. None of the above is correct.ANSWER: b. is unwilling to produce any output.TYPE: M KEY1: D SECTION: 2 OBJECTIVE: 2 GRAPH: 1 RANDOM: N7

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According to the graph, when price falls from P4 to P3, the firm finds thata. average revenue exceeds marginal revenue at a production level of Q3.b. profits are greater than zero at Q3.c. profits are maximized at a production level of Q3.d. All of the above are correct.ANSWER: c. profits are maximized at a production level of Q3.TYPE: M KEY1: D SECTION: 2 OBJECTIVE: 2 GRAPH: 1 RANDOM: N

If a perfectly competitive firm currently produces where price is greater than marginal cost ita. will increase its profits by producing more.b. will increase its profits by producing less.c. is making positive economic profits.d. is making negative economic profits.ANSWER: a. will increase its profits by producing more.TYPE: M KEY1: C SECTION: 2 OBJECTIVE: 2 RANDOM: Y9

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When a perfectly competitive firm makes a decision to shut down, it is most likely thata. price is below the minimum of average variable cost.b. fixed costs exceed variable costs.c. average fixed costs are rising.d. marginal cost is above average variable cost.ANSWER: a. price is below the minimum of average variable cost.TYPE: M KEY1: C SECTION: 2 OBJECTIVE: 3 RANDOM: YThe figure depicts the cost structure of a profit­maximizing firm in a competitive market.

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According to the figure, which line segment best reflects the long­run supply curve for this firm?a. ABb. BCc. CDd. None of the above, the long­run supply curve requires knowledge of the average variable cost structure.ANSWER: c. CDTYPE: M KEY1: G SECTION: 2 OBJECTIVE: 5 GRAPH:2 RANDOM: N11

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According to the figure, this firm will exit the market for any price on the line segmenta. CD.b. AB.c. CB.d. None of the above is correct.ANSWER: b. AB.TYPE: M KEY1: G SECTION: 2 OBJECTIVE: 4 GRAPH: 2 RANDOM: N

When a profit­maximizing firm’s fixed costs are considered sunk in the short run ita. will never show losses.b. can set price above marginal cost.c. maximizes profit by choosing an output level where price exceeds marginal cost.d. can safely ignore fixed costs when deciding how much to produce.ANSWER: d. can safely ignore fixed costs when deciding how much to produce.TYPE: M KEY1: D SECTION: 2 OBJECTIVE: 2 RANDOM: Y15

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In the long run, a profit­maximizing firm will choose to exit a market whena. fixed costs exceed sunk costs.b. average fixed cost is rising.c. revenue from production is less than total costs.d. marginal cost exceeds marginal revenue at the current level of production.ANSWER: c. revenue from production is less than total costs.TYPE: M KEY1: C SECTION: 3 OBJECTIVE: 4 RANDOM: YIn the figure, panel (a) depicts the linear marginal cost of a firm in a competitive market and panel (b) depicts the linear market supply curve for a market with a fixed number of identical firms.

According to the figure, if there are 200 identical firms in this market, what level of output will be supplied to the market when price is $2.00?a. 10,000b. 20,000c. 40,000d. It cannot be determined from the information provided.ANSWER: c. 40,000TYPE: M KEY1: C SECTION: 3 OBJECTIVE: 5 GRAPH: 3 RANDOM: N17

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According to the figure, when 150 identical firms participate in this market, at what price will 15,000 units be supplied to this market?a. $1.00b. $1.50c. $2.00d. It cannot be determined from the information provided.ANSWER: a. $1.00TYPE: M KEY1: C SECTION: 3 OBJECTIVE: 5 GRAPH: 3 RANDOM: N18

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When firms have an incentive to exit a competitive market, their exit willa. drive down market prices.b. drive down profits of existing firms in the market.c. decrease the quantity of goods supplied in the market.d. All of the above are correct.ANSWER: c. decrease the quantity of goods supplied in the market.TYPE: M KEY1: D SECTION: 3 OBJECTIVE: 4 RANDOM: Y19

If all incumbent firms and all potential firms have the same cost curves and the market is characterized by free entry and exit, the long­run market supply curvea. is equal to the sum of marginal cost curves.b. slopes downward.c. slopes upward.d. is horizontal.ANSWER: d. is horizontal.TYPE: M KEY1: C SECTION: 3 OBJECTIVE: 5 RANDOM: Y21

When firms in an industry have the same cost structure which is not changed by the entry or exit of firms,a. the long­run market supply curve must be upward sloping.b. the long­run market supply curve must be horizontal.c. the long­run market supply curve must be downward sloping.d. We can’t tell anything about the shape of the long­run market supply curve.ANSWER: b. the long­run market supply curve must be horizontal.TYPE: M KEY1: C SECTION: 3 OBJECTIVE: 5 RANDOM: Y

According to the figures, if the market starts in equilibrium at point C in panel (b), a decrease in demand will ultimately lead toa. a higher price.b. a new long­run equilibrium at point D in panel (b).c. fewer firms in the market.d. All of the above are correct.ANSWER: c. fewer firms in the market.TYPE: M KEY1: E SECTION: 3 OBJECTIVE: 4 GRAPH: 4 RANDOM: N24

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According to the figures, when a firm in a competitive market, like the one depicted in panel (a), observes market price rising from P1 to P2, it is most likely the result ofa. entrance of new firms into the market.b. the exit of existing firms in the market.c. an increase in market supply from Supply0 to Supply1.d. an increase in market demand from Demand0 to Demand1.ANSWER: d. an increase in market demand from Demand0 to Demand1.TYPE: M KEY1: C SECTION: 3 OBJECTIVE: 4 GRAPH: 4 RANDOM: N25

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When a competitive market experiences an increase in demand that induces an increase in producer costs, which of the following is most likely to arise?a. The long­run market supply curve will be upward sloping.b. The condition of free entry into the market will be violated.c. Producer profits must fall in the long run.d. All of the above are likely to occur.ANSWER: a. The long­run market supply curve will be upward sloping.TYPE: M KEY1: D SECTION: 3 OBJECTIVE: 5 RANDOM: Y